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Patented July 26, |898.

J. H. R. DINSMORE.

FIRE EXTINGUISHING SPRINKLER.

.Applicmw'n med out. 2e, 1897.)

{No Model.)

TN: uom'us PETERS ou, PNo'roALn'un., wAsmNcsTorw4 D. c.

innen JOHN H. R. DINSMORE, OF LIVERPOOL, ENGLAND, ASSIGNOR TO IVILLIAMHENRY DAVIES, OE MANCHESTER, AND JOHN EDWARD LEES, OF ROMI- LEY,ENGLAND.

FlRrE-EXTINGUISHING SPRINKLER.

SPECIFICATION forming part of Letters Patent No. 607,988, dated July 26,1898. Application filed October 26, 1897. Serial No. 656,431. (Nomodel.) Patented in England August 10, 1895,11'0. 15,083.

To all whom t may concern:

Be it known that I, JOHN H. R. DiNsMoRE, engineer, a subject of theQueen of Great Britain and Ireland, residing at Liverpool, England, haveinvented certain new and useful Improvements in Fire-ExtinguishingSprinklers, (for which I have received a patent in England, No. 15,083,dated August 10, 1895,) of which the following is a specification.

This invention has reference to nre-extinguishing sprinklers and to thattype of such Y sprinklers wherein when a fire takes place a valveconnected with a pressure-water servicepipe is automatically opened bythe heat of I5 the fire and supplies and sprays the water onto it andwhen the iire is extinguished automatically closes by the reduction oftemperature and stops the supply of water.

According to the present invention a sprinzo kler of this kind is socontrived, constructed,

and adapted to act that the valve will be operated at a low temperature,that it will remain open for some time after the iire has beenextinguished, so as to obtain what may be called an after supply7 ofwater, and

that itwill not be strained or put out of action by any temperature thatthe apparatus is subjected to, while at the same time it will be highlysensitive-that is, will come into 3o action very quickly after thetemperature of its atmosphere or the heat radiated upon it reaches sucha temperature as it is desired to act under.

This invention is illustrated in the accom- 3 5 panying drawing, whichis a longitudinal section, and the invention will be now described Withthe aid of this drawing.

The parts of the apparatus are combined with and carried on apressure-water service- 4o pipe In connection with this pipe there is avalve-case b, to the interior of which the pressure-water is directlyadmitted. In the vertical axis of this valve-case there is an opening bfor the passage of water, and this opening is controlled bya lift-valvec, whose axis is coincident with that of the case b and its aperture andwhich is adapted to open inward of the case, it being normally pressedupon its seat by the pressure of water within the case. h, which bearsdirectly upon it. 5o Above this valvecase there is a diaphragm- Vmaticdevice a, the plane of which is at right angles to the axis of the valveand the axis of which is coincident with the axis of the valve. Thisdiaphragmmatic device consists of two practically-parallelannularly-corrugated disks, the peripheries of which are'soldered orotherwise suitably fastened, and within it there is inclosed a pad a ofabsorbent material, such as blotting-paper, which is charged with asmall quantity, say a teaspoonful, of volatile liquid-Wiz.,hydrocarbonwhich evaporates at a temperature of from 95 to 120oFahrenheit. This device, therefore, constitutes a hermetically-closedvessel 4ot' extended surface and capable of large distension. One ofthese corrugated disks is directly connected with the valve c from itscenter by the valve-stem c', while the other diaphragm is iixed to abase-block e, rigidly supported from the valve-case b by an arm or armsf. Thus there is a practically rigid connectionl between the valve-caseand the base or frame, by which the diaphragmmatic device a is carried.In connection with the valve-case and directly under the opening Z912,through which the discharge of Water from it takes place, there isprovided the water sprayerl or distributer n, which is centrally carriedfrom the valve-case by the stem 'n'.

The apparatus will be disposed in a room or space at the upper part nearthe ceiling in the usual way, with the axis of the Water-discharge partof the valve-case vertically disposed. Under quiescent conditions thediaphragmmatic device ct will be collapsed and the valve c kept upon itsseat by the pressure of water in the valve-case h. When a iire takesplace and the temperature of the atmosphere about the apparatus israised to a certain point, or heat is radiated onto the device a, so asto heat it and evaporate the fluid within it, pressure is created' inthe device a, and, acting upon the diaphragm, causes the device todistend and to pressthe valve c 0E 95 its seat against the pressure ofwater acting upon it, and so to open the orice b and admit of freedischarge of Watera This Water strikes in its discharge thedistributing-disk n and is broken up and sprayed or distributed upwardand outward and then falls.

To open the valve c to give an area of opening round the valve equal tothe bore of the orifice b', only a small movement would be required; butto secure the after How of water-that is, a continued supply of waterafter the fire has been extinguished-the valve is adapted to be openedto a very large excess of the amount above referred to, and to obtainthis excessive opening the disks of the device a are made corrugated,and by the corrugations a comparatively large distention can take placewithout straining the joints or structure of the device. Then after theiire is over the device begins to cool; but the valve having been openedto the excessive degree described a considerable time elapsesbetween thecommencement of the closing and complete closure, so that the afterdischarge of water is secured. Further, as the water sprayed by theapparatus tends to temper the heat of the device a, and as only a smallquantity of volatile fluid is used in the device, the continuous actionof the fire or heat upon it does not create'a pressure which will causeit to be strained or burst.

It will be seen that the sprinkler-casing Z9 has a lateral nipple b2.This is extended inwardly and is closed at its inner end within thecasing b by the wall b3, leaving a narrow space between it and the outerwall of the casing. Openings are formed in this inner extension aboveand below and in line with each other, and into the lower opening thehead on the stem of the distributer is screwed. The discharge-openingfor the outer casing b is in line with these openings.

What is claimed in respect of Jthe hereindescribed invention is Incombination with the valve-case, the diaphragm,the valve with itsvalve-stem connected therewith, the distributer with its stern arrangedaxially in line with and below the valve and its stem and a casing bhaving a laterally-extending nozzle with an inwardly-ex` tending portionAclosed at its end by a wall b3 so as to leave a space between it andthe wall of the casing, the openings in the upper and lower parts ofsaid inner extension, the said distributer having a head screwed intothe lower opening of said extension, and the valve seated around theopening in the upper wall of the extension, the said openings togetherwith the discharge-opening from the casing being axially in line,substantially as described.

In testimony whereof I have hereunto set my hand in presence oftwo'subscribing witnesses.

JOHN H. R. DINSMORE.

Witnesses:

ERNEST R. RoYsToN, JOHN I-I. WALKER.

